Who is Participating?

For internal machines accessing the Internet the difference between NAT and PAT is whether you put a single IP address or a range of IP addresses in the 'global' command.

Completely separately you can also use the 'static' command to allow incoming connections to the servers via PAT/NAT. If you don't specify ports in the static command then everything is translated so it is effectivly NAT. If one external IP address is used like this then you cannot specify the same external address with any other 'static' command.

Do you have a single fixed IP address for your DSL connection?
If you do then you can only really use PAT.
If you have multiple external IP addresses then you can use a combination.

Evaluating a UTM appliance and vendor can prove to be an overwhelming exercise. How can you make sure that you're getting the security that your organization needs without breaking the bank? Check out our UTM Buyer's Guide for more information on what you should be looking for!

To add additional NAT entries you just use a 'static' command and don't put additional 'ip address' commands for example:-
static (inside,outside) 141.157.233.105 192.168.100.5 netmask 255.255.255.255 0 0
Note there is no 'tcp' parameter since you are defining NAT. If you were defining a static PAT entry you would have the protocol and ports listed aswell.